2= (>>60) (z<80) 5. A The ages of the thousands of residents of a retirement community are normally distributed with a mean of 70 and a standard deviation of 4 years. a. What proportion of this population is between 60 and 80? X.4 2= 2=60-70 = -2.5 = 6.21 4 2-80-76 J = 2.5=6.21 1-,99379 -3 = 6.21% +6.2 12.24% is bett 60- Year: b. If one sample of 45 residents is chosen at random, what is the probability that the sample mean age will be between 68.5 and 71.75? 68.5-45 2= 25.87
2= (>>60) (z<80) 5. A The ages of the thousands of residents of a retirement community are normally distributed with a mean of 70 and a standard deviation of 4 years. a. What proportion of this population is between 60 and 80? X.4 2= 2=60-70 = -2.5 = 6.21 4 2-80-76 J = 2.5=6.21 1-,99379 -3 = 6.21% +6.2 12.24% is bett 60- Year: b. If one sample of 45 residents is chosen at random, what is the probability that the sample mean age will be between 68.5 and 71.75? 68.5-45 2= 25.87
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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